We need to choose our battles to win the final war, says Underhill

Rugby Union - Rugby World Cup - Semi Final - England v New Zealand - International Stadium Yokohama, Yokohama, Japan - October 26, 2019 England's Sam Underhill in action with New Zealand's Brodie Retallick and Aaron Smith REUTERS/Matthew Childs

TOKYO (Reuters) - Matching South Africa's physicality has been the byword for the England squad this week but flanker Sam Underhill says they will have to pick their moments to engage in order to prevent the Rugby World Cup final turning into a war of attrition.

The way South Africa have approached most of their recent games follows a familiar pattern -- a huge pack creating a safe space for scrumhalf Faf de Klerk to slowly deliver endless up-and-unders for his team mates to chase.